single-phase watt-hour meters

DDSF846(double registers display) static single-phase multi-rate watt-hour meters Functions and features: 1. Equipped with the large scale integrated circuit, PIC chip microprocessor and SMT technology. 2. Measurement for dual-direction active-power electric energy with different tariff time, is provided (Negative electric energy can be counted into positive electric energy or separately) 3.Equipped with high-accuracy clock chip, the meter is also provided with a century calendar ranging form 2000 to 2099, and an accurate automatics switching function between the time and leap year. 4.Two tariffs and eight tariff times can be set by programming. 5.Parameters setting, enquiry and reading of working data and electricity consumption can be performed with the aid of infrared communication done by hand-held terminal or RS 485 communication. 6.Display electricity consumption on the double registers display. Specifications and parameters: 1. Rated voltage: 220v 2.Basic current: 1.5(6)A, 5(20)A,10(40)A,20(80)A 3.Accuracy class: 1.0, 2.0 4. Power loss:≤2W 5. Rated frequency: 50Hz 6.Infrared telecommunication distance:≥5m